Apparatus for casting reinforced-concrete vessels.



H. ALF SEN. APPARATUS FOR'CASTING REINFORCED CONCRETE VESSELS.

APPLICATION FILED NOV. 21, I918.

Patented Apr. 29, 1919.

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Qu /5E APPARATUS FOR CASTIN H. ALFSEN.

G REINFORCED CONCRETE VESSELS,

APPLICATION F ILED NOV.21, 1918- V Patented Apr. 29,1919,

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ALFSEN, OFIORSGRUND, NORWAY, .ASSIGNQB TO JOHN MOLLER LARSEN, OF

" CHICAGO, ILLINOIS.

APPARATUS non onsrrne 7 Specification of Letters Patent.

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Patented Apr. 29, rate.

Application filed November 21, 1918. Serial No. 263,622.

To all whom it may concern:

Be it known that I, HARALD ALrsEN, a subject of the King of Norway, ofPorsgrund, Norway, have invented certain new and useful Improvements inApparatus for Casting Reinforced-Concrete Vessels; and I do herebydeclare thefollowing to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to letters or figures of reference markedthereon, which form a part of this specification.

This invention relates to improvements in the casting of reinforcedconcrete vessels.

In casting concrete vessels the sheetings or molds generally are erectedfor each boat and removed after the casting has taken place. The presentinvention has for its object an arrangement by means of which theoutside sheeting may be removed in parts, as the respective parts of thecasting are hardened. Further, according to the present arrangement, themold can be maintained permanently for the casting of a number of boatsof different sizes.

This object is attained by connecting the several sheets or slabs ofwhich the outer; form is composed in an adjustable manner to astationary frame work which is placed in such a distance from theoutside surface of the vessel that the molds, sheets or boards may beremoved in order to give access to the cast surfaces so that the lattermay be given the finishing surface plastering as soon as they aresufficiently hardened. In this manner it is also possible to do with asmaller number of mold-sheets or boards, as a sheet from the loweripartof the casting when removed may be used again in the upper part of thesame casting.

On the drawing:

Figure 1 is a diagrammatical cross section through a form of theinvention. 7

Fig. 2 is a diagrammatical cross section through another form of theinvention.

Fig. 3 is a cross section on a larger scale showing part of a thirdmodification.

Fig. 4 is a section on the line IV-IV Fig. 3.

. On Fig. 1, 1 designates the permanent stationary frame-work, forinstance a dock or the like. The outside wall of the mold for castingthe side walls 3 of a ship 2 is formed by sheets or boards 4 fastened tothe inner ends of rods or planks 5 slidably mounted in the stationaryframe or dock 1. The sheets or boards 4" are adapted in size and form tothe wall of the ship and are placed in a suitable distance from theinner wall of frame-work or the like 1 so that they form together acontinuous outside mold sheeting. As soon as the casting of the wall isfinished at the lower sheets 4, the same are removed as indicated in thedrawing and give access to the finished cast walls at their inside.

In the modification shown in Fig. 2 the boards or sheets 4 are connectedto the stationary frame-work 1 by means of rods 6, which may be hingedto the sheets 4 and fastened with their opposite ends to the frame-work1 as shown on the left hand side of Fig. 2, or hinged together at theirmiddle and pressed with their opposite ends toward sheets 4 andframe-work 1.

In the form of the invention illustrated on Figs. 3 and 4 the ship is tobe cast with its bottom up. In this case wedge-shaped pieces 7 8 areplaced between the framework 1 and the boards 4 in order to keep thesaid boards in position. As indicated on Fig. 4 one set of wedges may beplaced at each joint of the boards 4, and the framework 1 at the sametime is so constructed that one column is placed opposite each joint.The wedge pieces, as seen on Fig. 3, may cover a number of sheetingboards 4, and when the grout inside the lowest set of boards ishardened, the wedges keeping said set of boards in place are removed,and the boards may be taken away leaving that part of the walluncovered.

- I claim:

1. In an arrangement for casting vessels and the like of reinforcedconcrete an outside mold sheeting consisting of separate boards orsheets, a permanent stationary frame-work or dock at a certain distancefrom the said outside mold sheeting and removable wedges covering two ormore sheeting boards between the said stationary frame-work and theexterior sheeting for keeping the latter in position.

2. In an arrangement for casting vessels and the like of reinforcedconcrete an outside mold sheeting consisting of separate boards orsheets, a permanent stationary framework or dock at a certain distancefrom the said outside mold sheeting and removable as my invention, Ihave signed my name in Wedges covering the joints of twosuccespresenceof tWo subscribing Witnesses. slve rows of sheeting boards placedbetween the columns of said stationary frame-Work HARALD ALFSEN" and theexterior sheeting for keeping the Witnesses: V V

latter in position. MAGENS BUGGE, In testimony that I claim theforegoing ELISE POULSSAU.

Copies of this patent man be obtained for five cents each, by addressingthe Commissioner 01' Patents, Washington, D. G.

